VIENNA

25′ 6”

VERACRUZ

30′ 5″-32′ 5″

VALENCIA

36′ 10” – 38′ 2”

VERONA

36′ 8” – 39′ 10”

VERONA LE

37′ 6″ – 39′ 6″

EXPLORER

38′ 5″ – 40′ 6″

CLASSIC

38′ 0″-45′ 0″

XL

43′ 6” – 44′ 11”

VIENNA

25′ 6”

VERACRUZ

30′ 5″-32′ 5″

VALENCIA

36′ 10” – 38′ 2”

VERONA

36′ 8” – 39′ 10”

VERONA LE

37′ 6″ – 39′ 6″

EXPLORER

38′ 5″ – 40′ 6″

CLASSIC

38′ 0″-45′ 0″

XL

43′ 6” – 44′ 11”

Villagio

25′ 6”

This is the killer. The L850-GL will reject any unsigned flash image. The bootloader verifies a digital signature using a key fused into the silicon. Without the private key (owned by Fibocom/Intel), you cannot flash modified firmware.

But for a niche group of users—network engineers, hardware enthusiasts, and unfortunately, device fraudsters—the question arises:

Fibocom offers a tool called or Fibocom Engineering Toolkit to authorized partners. This tool, together with a signed "NVM Package", can re-write the IMEI. The process requires:

To change the IMEI on your Fibocom L850-GL module: